As explained elsewhere here on, chlamydia is the most common STI in the UK.

But just how common is it?

We thought it might be interesting to get together some figures from Public Health England to demonstrate how large a proportion of STIs in England chlamydia is responsible for.

In addition, we also thought it might be interesting to compare the most recent STI figures to those of ten years ago, to see which infections have increased or declined in prevalence during this time.

Condition*Total new diagnoses in England in 2013Per 1000 of estimated populationMale incidences (% of total)Female incidences (% of total)Rise on 2012 (%)Rise on 2004 (%
Chlamydia208,7553.986,527 (41%)120,242 (58%)960 (0.5%)Data not comparable**
Gonorrhoea29,2910.521,469 (73%)7,637 (26%)3,714 (14.5%)8,622 (41.7%)
Herpes (genital)32,2790.620,019 (62%)12,258 (38%)246 (0.7%)15,585 (93.4%)
Genital warts73,4181.432,614 (44%)40,796 (56%)-461 (-0.6%)6,167 (9.2%)
Syphilis3,2490.12,970 (91%)279 (9%)268 (9%)623 (23.7%)
Non-specific genital infection53,962147,079 (87%)6,879 (13%)-5,968 (-10%)-21,899 (-28.9%)

* - New diagnoses in England
** - Data for Chlamydia from this period is only available as a statistic of 15-24 year olds.

Key trends:

  • Chlamydia is the most commonly diagnosed STI by a wide margin, and accounts for almost half of all newly diagnosed STI cases in England.
  • Gonorrhoea on the rise again. Significant increase (over 40%) in the last decade.
  • New cases of genital herpes have almost doubled since 2004.
  • New diagnoses of genital warts have fallen between 2012 and 2013 but remain significantly high.
  • More than nine out of every ten new cases of syphilis is diagnosed in men.
  • Significant drop in non-specific genital infection diagnoses may account for some of the rises in prevalence of other conditions. This might be due to better and more accurate diagnosis methods.
Page last reviewed:  Friday, Apr 22 2016